Promise Technology 66 Pro user manual Flash, Flush, Geometry, Hot spare, Hot swap

SuperTrak66™ User's Manual		Appendix G
EIDE	Enhanced Integrated Device Electronics: An I/O data bus model used
	by ATA and ATAPI devices. This model is superior to IDE allowing the
	addition of larger capacity devices through LBA addressing, and better
	performance through faster PIO and DMA data transfer specificat ions.
flash	A term used loosely to describe the ability to upload and download
	memory images to/from NVRAM in order to update some type of
	system software.
flush	A term describing the action of taking data written to cache memory
	and writing the data out to the disk.
GB	Gigabyte: 1,073,741,824 bytes. 1,024∙1,024∙1,024; commonly
	mistaken for 1,000,000,000 which is incorrect. 1,073,741,824 is
	derived from the base 2 (binary) numbering system.
geometry	A set of values which numerically describe the address limits of a
	media device, and enables software and hardware to fully control the
	device. CHS and LBA are types of geometry.
HDM	Hardware Driver Module: A software component of IxWorks which is
	used to access hardware devices attached through a local bus.
hot spare	A drive which remains attached to the RAID controller system, but is
	unassigned to any particular array. In the event of a drive fault in a fault
	tolerant array, the drive is activated to take the place of the failed drive.
hot swap	The ability to install/remove drive(s) from a system while it is still
	powered up and running. A system supporting hot swap should not
	have any problem detecting the removal or reattachment of a hot
	swapped device. SuperTrak66 takes advantage of hot swapping to
	allow removal and replacement of dysfunctional hard drives using the
	optional FastSwap66 or SuperSwap66 removable drive housings.
IDE	Integrated Device Electronics: An I/O data bus model used by ATA
	and ATAPI devices.
I/O	Input / Output: A term loosely used to describe the movement of data
	to and from hardware devices.
IP	Internet Protocol: Often referred to as “IP Address.” IP is a series of 4
	numbers separated by “.” (ex. “127.0.0.1”.) The IP represents a
	unique system on a network that may be communicated with. Each
	number may hold a value with ranges from 0 (zero) to 255. This
	translates to over 4 billion possible combinations of addresses.
I2O	Intelligent Input/Output: A message-based I/O architecture.
ISM	Intermediate Software Module: A software component of IxWorks used
	to access devices hosted by a HDM as used by SuperTrak. The ISM
	is more intelligent and provides features like RAID and caching.

G-3